Structure and properties of powder alloys Fe–(45-15)%Ni–(10-5)%Cu, obtained via mechanical alloying

It is known that operating properties of metal matrix diamond-bearing composites for cutting are mainly determined by metallic matrix properties [1, 2]. A metal matrix (binding) should provide strong fixing of diamond grains during cutting (from one side) and be wear-resistant for stable operation of a diamond tool in stationary self-sharpening procedure (from other side) [3–6]. Additionally, binding should allow to obtain diamond-bearing segments at relatively low temperatures (usually below 900 °С, to avoid substantial graphitization of diamond grains during sintering) [7–9], as well as to have high heat conductivity for efficient heat removal from the cutting area [10] and also be characterized by sufficient stiffness to prevent incorporation of diamond grains into binding during cutting. Thereby, selection of optimal composition of binding alloy is considered as the complex material science problem because the requirements for such materials are various and often contradictory. Fe-based alloys are prospective for use as matrix material for cutting diamond tools [11–13]. Pure ferrous powders for manufacture of diamond segments can’t be used on the following causes. Due to high melting temperature (Tm=1539 °С), ferrous powders are hardly sinStructure and properties of powder alloys Fe–(45-15)%Ni–(10-5)%Cu, obtained via mechanical alloying